Find the LCD for the rational expression.
, 
, 
A. x(x + 9)(x - 9)
B. 18x(x2 + 9)(x2 - 9)
C. 18x(x + 9)2(x - 9)
D. 2x(x + 9)(x - 9)
Answer: D
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Find the extreme values of the function subject to the given constraint.
A. Maximum: 36 at 
minimum: -36 at 
B. Maximum: 26 at 
minimum: 0 at 
C. Maximum: 26 at 
minimum: -26 at 
D. Maximum: 36 at 
minimum: 0 at 
Solve the system.5x - 7y + 6z = 7-20x + 28y - 24z = -2820x - 28y + 24z = 28
A. Infinitely many solutions B. (-3, 2, 6) C. No solution D. (2, 6, -3)
Determine whether the given geometric series is convergent or divergent, and find the sum if it is convergent.128 - 64 + 32 - 16 + ...
A. Convergent; S = 256 B. Divergent C. Convergent; S = 85.33 D. Convergent; S = 51.2
Perform the indicated operation and write the answer in the form 
where a and b are real numbers.(6 + 3i) - (-8 + i)
A. -14 - 2i B. 14 + 2i C. -2 + 4i D. 14 - 2i